globalchange

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fertilizers(4)
greenhouse gases(4)
agricultural soil science(2)
carbon dioxide(2)
cereal crops(2)
nitrates(2)
rice(2)
agricultural production(1)
agriculture(1)
ammonia(1)
carbon sequestration(1)
crop management(1)
edaphology(1)
farms(1)
forests(1)
global warming(1)
grasses(1)
marshes(1)
nitrification(1)
salinity(1)
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